/*
* This routine starts the application. It includes application,
* board, and monitor specific initialization and configuration.
* The generic CPU dependent initialization has been performed
* before this routine is invoked.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* Modified to support the MCP750.
* Modifications Copyright (C) 1999 Eric Valette. valette@crf.canon.fr
*
* $Id$
*/
#include <bsp.h>
#include <rtems/libio.h>
#include <libcsupport.h>
#include <string.h>
#include <bsp/consoleIo.h>
#include <libcpu/spr.h>
#include <bsp/residual.h>
#include <bsp/pci.h>
#include <bsp/openpic.h>
#include <bsp/irq.h>
#include <bsp.h>
#include <libcpu/bat.h>
#include <bsp/vectors.h>
extern void _return_to_ppcbug();
extern unsigned long __rtems_end;
extern unsigned long _end;
extern unsigned long __bss_start;
extern void L1_caches_enables();
extern unsigned get_L2CR();
extern void set_L2CR(unsigned);
extern void bsp_cleanup(void);
/*
* Copy of residuals passed by firmware
*/
RESIDUAL residualCopy;
/*
* Copy Additional boot param passed by boot loader
*/
#define MAX_LOADER_ADD_PARM 80
char loaderParam[MAX_LOADER_ADD_PARM];
/*
* Vital Board data Start using DATA RESIDUAL
*/
/*
* Total memory using RESIDUAL DATA
*/
unsigned int BSP_mem_size;
/*
* PCI Bus Frequency
*/
unsigned int BSP_bus_frequency;
/*
* processor clock frequency
*/
unsigned int BSP_processor_frequency;
/*
* Time base divisior (how many tick for 1 second).
*/
unsigned int BSP_time_base_divisor;
/*
* system init stack and soft ir stack size
*/
#define INIT_STACK_SIZE 0x1000
#define INTR_STACK_SIZE 0x4000
void BSP_panic(char *s)
{
printk("RTEMS 4.x PANIC %s\n", s);
_return_to_ppcbug();
}
void _BSP_Fatal_error(unsigned int v)
{
printk("RTEMS 4.x PANIC ERROR %x\n", v);
_return_to_ppcbug();
}
/*
* The original table from the application and our copy of it with
* some changes.
*/
extern rtems_configuration_table Configuration;
rtems_configuration_table BSP_Configuration;
rtems_cpu_table Cpu_table;
char *rtems_progname;
/*
* Use the shared implementations of the following routines
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, unsigned32, int );
/*
* Function: bsp_pretasking_hook
* Created: 95/03/10
*
* Description:
* BSP pretasking hook. Called just before drivers are initialized.
* Used to setup libc and install any BSP extensions.
*
* NOTES:
* Must not use libc (to do io) from here, since drivers are
* not yet initialized.
*
*/
void bsp_pretasking_hook(void)
{
rtems_unsigned32 heap_start;
rtems_unsigned32 heap_size;
heap_start = ((rtems_unsigned32) &__rtems_end) +INIT_STACK_SIZE + INTR_STACK_SIZE;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
heap_size = (BSP_mem_size - heap_start) - BSP_Configuration.work_space_size;
#ifdef SHOW_MORE_INIT_SETTINGS
printk(" HEAP start %x size %x\n", heap_start, heap_size);
#endif
bsp_libc_init((void *) heap_start, heap_size, 0);
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
void zero_bss()
{
memset(&__bss_start, 0, ((unsigned) (&__rtems_end)) - ((unsigned) &__bss_start));
}
void save_boot_params(RESIDUAL* r3, void *r4, void* r5, char *additional_boot_options)
{
residualCopy = *r3;
strncpy(loaderParam, additional_boot_options, MAX_LOADER_ADD_PARM);
loaderParam[MAX_LOADER_ADD_PARM - 1] ='\0';
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
int err;
unsigned char *stack;
unsigned l2cr;
register unsigned char* intrStack;
register unsigned int intrNestingLevel = 0;
unsigned char *work_space_start;
/*
* enables L1 Cache
*/
L1_caches_enables();
/*
* Enable L2 Cache
*/
l2cr = get_L2CR();
#ifdef SHOW_LCR2_REGISTER
printk("Initial L2CR value = %x\n", l2cr);
#endif
if (! (l2cr & 0x80000000))
set_L2CR(0xb9A14000);
/*
* the initial stack has aready been set to this value in start.S
* so there is no need to set it in r1 again...
*/
stack = ((unsigned char*) &__rtems_end) + INIT_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE;
/*
* Initialize the interrupt related settings
* SPRG0 = interrupt nesting level count
* SPRG1 = software managed IRQ stack
*
* This could be done latter (e.g in IRQ_INIT) but it helps to understand
* some settings below...
*/
intrStack = ((unsigned char*) &__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE;
asm volatile ("mtspr 273, %0" : "=r" (intrStack) : "0" (intrStack));
asm volatile ("mtspr 272, %0" : "=r" (intrNestingLevel) : "0" (intrNestingLevel));
/*
* Initialize default raw exception hanlders. See vectors/vectors_init.c
*/
initialize_exceptions();
select_console(CONSOLE_LOG);
/* We check that the keyboard is present and immediately
* select the serial console if not.
*/
err = kbdreset();
if (err) select_console(CONSOLE_SERIAL);
printk("-----------------------------------------\n");
printk("Welcome to RTEMS 4.1.1 on Motorola MCP750\n");
printk("-----------------------------------------\n");
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Residuals are located at %x\n", (unsigned) &residualCopy);
printk("Additionnal boot options are %s\n", loaderParam);
printk("Initial system stack at %x\n",stack);
printk("Software IRQ stack at %x\n",intrStack);
printk("-----------------------------------------\n");
#endif
#ifdef TEST_RETURN_TO_PPCBUG
printk("Hit <Enter> to return to PPCBUG monitor\n");
printk("When Finished hit GO. It should print <Back from monitor>\n");
debug_getc();
_return_to_ppcbug();
printk("Back from monitor\n");
_return_to_ppcbug();
#endif /* TEST_RETURN_TO_PPCBUG */
/*
* Init MMU block address translation to enable hardware
* access
*/
/*
* PC legacy IO space used for inb/outb and all PC
* compatible hardware
*/
setdbat(1, 0x80000000, 0x80000000, 0x10000000, IO_PAGE);
/*
* PCI devices memory area. Needed to access OPENPIC features
* provided by the RAVEN
*/
setdbat(2, 0xc0000000, 0xc0000000, 0x08000000, IO_PAGE);
/*
* Must have acces to open pic PCI ACK registers
* provided by the RAVEN
*/
setdbat(3, 0xfeff0000, 0xfeff0000, 0x10000, IO_PAGE);
printk("Going to start PCI buses scanning and initialization\n");
InitializePCI();
printk("Number of PCI buses is found : %d\n", BusCountPCI());
#ifdef TEST_RAW_EXCEPTION_CODE
printk("Testing exception handling Part 1\n");
/*
* Cause a software exception
*/
__asm__ __volatile ("sc");
/*
* Check we can still catch exceptions and returned coorectly.
*/
printk("Testing exception handling Part 2\n");
__asm__ __volatile ("sc");
#endif
BSP_mem_size = residualCopy.TotalMemory;
BSP_bus_frequency = residualCopy.VitalProductData.ProcessorBusHz;
BSP_processor_frequency = residualCopy.VitalProductData.ProcessorHz;
BSP_time_base_divisor = (residualCopy.VitalProductData.TimeBaseDivisor?
residualCopy.VitalProductData.TimeBaseDivisor : 4000);
/*
* Set up our hooks
* Make sure libc_init is done before drivers initialized so that
* they can use atexit()
*/
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.postdriver_hook = bsp_postdriver_hook;
Cpu_table.do_zero_of_workspace = TRUE;
Cpu_table.interrupt_stack_size = INTR_STACK_SIZE;
Cpu_table.clicks_per_usec = BSP_processor_frequency/(BSP_time_base_divisor * 1000);
Cpu_table.exceptions_in_RAM = TRUE;
#ifdef SHOW_MORE_INIT_SETTINGS
printk("BSP_Configuration.work_space_size = %x\n", BSP_Configuration.work_space_size);
#endif
work_space_start =
(unsigned char *)BSP_mem_size - BSP_Configuration.work_space_size;
if ( work_space_start <= ((unsigned char *)&__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE) {
printk( "bspstart: Not enough RAM!!!\n" );
bsp_cleanup();
}
BSP_Configuration.work_space_start = work_space_start;
/*
* Account for the console's resources
*/
console_reserve_resources( &BSP_Configuration );
/*
* Initalize RTEMS IRQ system
*/
BSP_rtems_irq_mng_init(0);
#ifdef SHOW_MORE_INIT_SETTINGS
printk("Exit from bspstart\n");
#endif
}
